National Power was an energy company based in the United Kingdom.

National Power was formed following the privatisation of the UK electricity market in 1990.

Its generation (or upstream) activities were transferred to three generating companies, National Power, Nuclear Electric and PowerGen, and its transmission (or downstream) activities to the National Grid Company.

[2][3] National Power was the largest of these new companies having around 52 percent of the generating market.

[4] On 2 October 2000 following investor pressure the company demerged into two separate companies Innogy, which was responsible for the UK based operations, and International Power, which took over the international operations.